Locomotive and like boiler.



F. H. TREVITHIICK.

LOCOMOTIVE AND LIKE BOILER. APPLICATION Hush 05cm 3912.

3 SHEETS-SHEET 1.

1,296,233. Patented Mar. 4,1919.

INVENTOR F. H. TREVITHICK. v LOCOMOTIVE AND LIKE BOILER.

APPLICATION FILED DEC. 7, l9l2.

1,296,233. Patented Mar. 4,1919.

3 SHEETS-SHEET 2.

F. H. TREVITHICK.

LOCOMOTIVE AND LIKE BOILER.

7 APPLICATION FILED DEC. 7. 1-912.

1,296,233. I Patented Mar. 4,1919.

3 SHEETS-SHEET 3.

FREDERICK HARVEY TREVITHICK, OF CAIRO, EGYPT.

LOCOMOTIVE AND LIKE BOILER.

Specification of Letters Patent.

Patented Mar. 4, 1919.

Application filed December 7, 1912. Serial N 0. 735,470.

To all whom it may concern:

Be it known that I. FREDERICK HARVEY T imvITHICK, a subject of the King of Great- Britain and Ireland. and resident of Zeitoun, Cairo, Egypt, have invented certain new and useful Improvements in or Relating to Locomotive and like Boilers, of which the following is a specification.

This invention relates to locomotive marine or other boilers of the kind which are fitted with either feed water heaters or steam superheaters or with both feed-Water heaters and steam superheaters.

One object of the present invention is to devise means such as shall insure that the smoke-box heater which may be arranged for either stcam-superheating or for feedwater heating or for both these purposes, while normally in the most advantageous position for efficiency in operation, may not unduly encumber the smoke-box when access to the latter is desired for any reason.

A further object of the invention is to so arrange exhaust steam feed-water heaters that the temperature of the feed-water may be raised to a maximum before leaving such heaters.

A still further object of the invention is to prevent undue condensation of the exhaust steam'in the feed-water heaters with consequent ejection of water with the exhaust steam from the chimney.

The invention consists in carrying the smoke-box heater and its appurtenances, and if convenient and desirable, the uptake or stack upon the main smoke-box door or upon a portion of the smoke-box hinged to the main smoke-box; such an arrangement insures that while the heater is norn'ially in the most advantageous position for operation. that is, in the line of flow of the flue gases the smoke-box is entirely freed from the heater when the hinged portion carrying the same is open and the smoke-box and the heater are thereby rendered readily acces sible.

The invention also consists in adapting the connections between the smoke-box heater and the feed pipe or the exhaust steam heaters. and boiler clack box, when using the heater for feed water, or the connections between the heater and the boiler and the cylinder steam chests when using the heater for drying steam or both when steam drying and feed water heating, so as to make provision for the swinging movement of the hinged portion above referred to, so that the latter may be opened when required without interfering with the necessary connections.

The invention also consists in providing means which shall insure that the whole of the exhaust steam passes through the exhaust steam feed-water heaters before issuing from the blast pipe so that the .temperature of the feed-water may be raised to a maximum before it leaves such heaters.

'I he invention further consists in the provision of a supplementary exhaust steamheater in which the temperature of the feedwater may be raised to a certain extent before passing to the main exhaust steam heaters so that the condensation of exhaust steam in the latter may be reduced to a minimum.

The invention still further consists in the various details and arrangements hereinafter more particularly referred to.

The accompanying drawings illustrate two modes of carrying out the invention: 7

Figure 1 is a side elevation showing a portion of a locomotive fitted with one conyenient arrangement in accordance with the invention.

Fig. 2 is a front elevation showing also, in dotted lines the open position of the hinged section.-

Fig. 3 is a part sectional plan taken on line 33 of Fig. 2.

Fig. at is a side sectional elevation taken on line 44 of Fig. 3.

Fig. 5 is a side elevation showing a modified arrangement, while Fig. 6 is a part sectional front elevation of the arrangement shown in Fig. 5,

Fig. 7 is a part sectional plan, and

Fig. 8 is an enlarged detail sectional view of one of the pipes.

In carrying my invention into effect in one convenient manner when applying it, for example, to a locomotive boiler and as illustrated in Figs. 1-4, I divide the smokebox into two-portions a b hinged together by a hinge c of suitable size and strength to 'arry the necessary weight; and to the front or movable portion a I attach in any suitable manner the smoke-box heater a which may conveniently take the form of one or more. drums according to the purpose to which this heater is put. carrying its own smoke-box and the uptake or stack 6, the various parts being preferably so positioned I by horizontal plates (Z Fig. 4,

that the smoke-box heater is placed comparatively low down in the smoke-box so as to insure an eflicient length of stack, this feature being of importance particularly in connection with modern locomotives where the over-all length of stack is limited by tunnels and bridges or other constructions pass to the stack 6.

I exhaust steam heaters or be more fully nection may take the Any suitable form of movable connections between the smoke-box heater and the between the steam cylinders and the boiler may be employed for allowing the movement of the hinged portion of the smoke-boxer door carrying the heater without disturbing the connections.

i In one convenient construction the conform of two fixed pipes f 9 between which is a short movable pipe h divided into two compartments, as shown in Fig. 8. The axis of rotation of the movi able pipe .smok -box hinge a h is in alinement with that of the and the upper and lower and fixed ipes f and g are provided with any suitab e form of gland and bush 71 pro-' vided with metallic or other packing to make water or steam-tight connections with the movable pipe h and are connected respectively to the feed pipe or exhaust steam heaters and .to the, boiler clack box. The two compartments ofthe movable pipe h are connected respectively with the inlet and outlet of the smoke-box heater as clearly seen in Fig. 2. I

It is to be understood that-the movable connection is a tion and the form given is byway of example only as it will e obvious that many equivalentforms of construction may-be employed for this purpose as, for instance, ment or by simple swivel unions suitably centered, or if convenient or to provide the described hereinafter. The smoke-box heater d'may be provided witha spark arrester k of any suitable form and having preferably the part is hinged so as to swing open, and it may also be arsmoke-box heater tubes (1 before entering that with the arrangement so far described the heater, I box is closed, is placed in the line blast pipe g,

. as shown at t (Fig. 3) or in ingat" and detail incident to my inven-.-

of construction above.

a lazy tongs arrangefound desirable the smoke-boxhinge itself may be arranged necessary connections, as will this. smoke-box heater the ranged with its own smoke-box 1- of reduced size, to which a supplementary door Z is fitted, thus insuring ready accessibility to the and tube plates d The gases of combustion, as a matter of fact, pass through'the spark arrester is before entering the tubes 03, and, after leaving said tubes, pass through the smoke-box r the smoke stack 6. The smoke stack 6 may be secured to or form part of the heater smoke-box, and it will be seen that by my improved arrangement I amenabled to secure an efficient length of smoke stack thereby insuring an adequate draft for the exhaust steam up the smoke stack and if desired the usual uptake we may be provided beneath the smoke-stack. The exhaust steam heaters a are preferably connected at one end by means of a Y or other suitable connecting pipe 0 secured to the exhaust pipe p (Fig. 4) from the steam cylinders while the other ends of the heaters are connected by a- T or other suitably shaped the upper end of which is arranged to discharge into the heater smoke box 1'. The upper part of the blast pipe may becarried by the movable portion of the smoke-box and any suitable form of ointing may be provlded between the upper movable and lower fixed portion of the blast pipe arranged so that such joints may be quickly and easily made and unmade, as, for instance, by means of a stirrup and set screw, or any other convenient device.

heaters a supplementary heater 8 may be.

is fedwith water from pipe provided which 4 and with exhaust steam from an extension of the horizontal portion of the blast nozzle any other suit-. able manner, the supplementary heater being preferably provided with an outer cassuitable drain pipes (not shown) from which. the condensed exhaust steam may be allowed to drain. The water enters the supplementary heater 8 through the passes thence through into the adjacent heater. n, and "thence through the pipe 3'into theother heater a. From the latter, it passes through the pipe the pipe 4 v n (Fig. 2) into the lower portion of the fitting h, whence-it passes through the lower part of'the smoke-box heater d. Through water is constrained to travel in a zig-zag path by means of through the tubes d. The heatedwater v the plates or baffles d being heated in its passage bythe gases passing then issues from the upper part of the heater by the ipe n by which it enters the upper part 0 the fitting h, whence it passes by way of the pipe h and enters the boiler at the point I). (Fig. 1).

Figs. 5 to 7 illustrate a modified arrangement in which the heater suitably incased is supported on or inserted through the smoke box door, instead of being mounted in a movable portion of the smoke-box, and the main hinge is itself adapted to provide the necessary movable pipe connections above referred to. i

In the construction shown in the drawin s which is given b way of example-enly t e hinge consists 0 two T pipes 12 to having their outer ends supported in brackets 00 while their inner ends work in a castin a bolted or otherwise secured to the smo ebox front plate.

The piece a is provided with glands packed metallicallyor otherwise or the necessary tightness to steam. or water may be insured by employing ground faces held together by rings, collars, etc., or by any other convenient arrangement. a

To the T pipes 12 'w which are thus rotatably mounted and retained in position by their extreme end supports is-bolted or otherwise secured the movable part of the smoke-box, or as shown in Figs. 5, 6 and 7, the smoke-box door which may be flat and which carries the heater, its smoke-box and the stack in the manner above described with reference to the first form, The pipes 11 w are further connected by means of pipes l, 2, suitable for either steam or water as desired to the smoke-box heater. T'he longitudinal portion of the blast pipe has its end coned and the vertical swinging portion may be correspondingly coned so that an effi'cient joint may be formed when the whole device is closed. I

I do not desire to confine my invention to the details of construction hereinbefore given by way of example as I may modify the size, location and arrangement of the various parts to suit the type of boiler to which my invention is to be applied and the varying conditions under which my invention is to be employed; for example, when applying my invention to a locomotive" boiler fitted with a short smoke-box the heater smoke-box and the stack may be arranged in front of the main smoke-box as shown in Fig. 5, the whole being suitably boxed in in order to prevent any unusual or unsightly appearance.

Having now described my invention what I claim as new and desire to secure by Lettors Patent is Y 1. In a. boiler the combination of a smokebox, a movable member then an, an auxiliary heater within the smoke-box and an uptake, both auxiliary heater and uptake be.

' to, a heater'within the smoke-box and carried by the movable portion, movable connections from the source of medium to be heated to the heater and a spark arrester in connection with. the heater.

.4. In a boiler the combination of a smokebox, having a movable portion, a tubular hinge uniting the two portions of the smokebox and a heater projecting rearwardly into the smoke-box and carried by the movable portion.

, 5. In a boiler the combination of a smokebox having a movable portion hinged thereto, a heater within the smoke box and carried by the movable portion, movable connections from the source of medium to be heated to the heater and an auxiliary smokebox for said heater.

6. In a boiler the combination of a smokebox having a movable portion hinged thereto, a heater within, the smoke-box and carried by the movable portion, movable connections from the source of medium to be heated to the heater, an auxiliary smokebox for said heater and an uptake connected to said heater smoke-box.

7. In a boiler, the combination of a smokebox having a movable portion hinged thereto, a heater within the smoke-box and carried by the movable portion, movable connections from the source of medium to be heated to the heater, an auxiliary smokebox for said heater and a. door for said auxiliary smoke-Ibex.

8. In a boiler the combination of a smokebox having a movable portion hinged thereto, a heater within the smoke-box and car ried by the movable portion, a spark arrester connected with said heater, movable. 

